highroll_moKlLong time lurker here, so here is what I look at before signing up anywhere. After trying maybe a dozen sites I stopped going by ads alone.
First thing is the licence: find the licence number and look it up, and whether they actually accept players from your country. After that I look at banking: I want at least one fast e-wallet option, and the withdrawal limits need to be written clearly.
Bonuses are the tricky part. Read the wagering and the max bet rule, and some games count less towards it. A good recent review that covers all of this is worth a read here [url=https://racetime.gg/team/casino-guide-szudoxq]Just4win Casino[/url] so you know what you are signing up for.
Most of my sessions are on mobile, and a good site loads fast and does not log you out every five minutes. Support matters too: a real human reply beats a bot loop.
Anyway, that is my routine. Only play with money you can afford to lose.